login.php for PHPAuction allows remote attackers to gain privileges via a direct call to login.php with the action parameter set to "insert," which adds the provided username to the adminUsers table.

PhpAuction 2.5 allows remote attackers to bypass authentication and gain privileges as another user by setting the PHPAUCTION_RM_ID cookie to the user ID.

SQL injection vulnerability in PhpAuction 2.5 allow remote attackers to modify SQL queries via the category parameter to adsearch.php. NOTE: there is evidence that viewnews.php may not be part of the PhpAuction product, so it is not included in this description.

Multiple cross-site scripting (XSS) vulnerabilities in PhpAuction 2.5 allow remote attackers to inject arbitrary web script or HTML via the lan parameter to (1) index.php or (2) admin/index.php, or (3) the auction_id parameter to profile.php. NOTE: there is evidence that viewnews.php and login.php may not be part of the PhpAuction product, so they are not included in this description.

Directory traversal vulnerability in PhpAuction 2.5 allows remote attackers to read arbitrary files, include local PHP files, or obtain sensitive path information via ".." sequences in the lan parameter to (1) index.php or (2) admin/index.php.